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Note on 125 GeV Spin-2 particle · Around

2012

Note on 125 GeV Spin-2 particle

Geng, Chao-Qiang, Huang, Da, Tang, Yong et al.

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A new boson around 125 GeV without specific spin has been observed by both ATLAS and CMS at the LHC.

Since its decay into a diphoton excludes the spin-1 case by the Landau-Yang theorem,it leaves 0 or 2 as the possible lowest spin for the new boson.
Instead of the well-established spin-0 Higgs-like boson, we take this new boson to be a spin-2 massive Graviton-like particle denoted as $G$, which exists copiously in extra-dimension theories, and concentrate on its phenomenology.
In particular, we calculate the three-body decays of $G\rightarrow V f\bar{f}'$ with $V$ and $f^{(\prime)}$ the gauge boson and fermions in the standard model (SM) and compare our results with those of the SM Higgs boson.

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